Annotations: 8CEM

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth E]	F_UNCLASSIFIED	e8cemE3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: F_UNCLASSIFIED	ECOD (1.6)
C [auth F]	F_UNCLASSIFIED	e8cemF4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth A]	F_UNCLASSIFIED	e8cemA6	A: beta barrels	X: OB-fold	H: TIMP-like (From Topology)	T: TIMP-like	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth A]	F_UNCLASSIFIED	e8cemA3	A: beta sandwiches	X: jelly-roll	H: Spermadhesin, CUB domain (From Topology)	T: Spermadhesin, CUB domain	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth A]	F_UNCLASSIFIED	e8cemA7	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth A]	F_UNCLASSIFIED	e8cemA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth A]	F_UNCLASSIFIED	e8cemA1	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth A]	F_UNCLASSIFIED	e8cemA5	A: few secondary structure elements	X: Anaphylotoxins (complement system) (From Topology)	H: Anaphylotoxins (complement system) (From Topology)	T: Anaphylotoxins (complement system)	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth B]	F_UNCLASSIFIED	e8cemB5	A: beta barrels	X: OB-fold	H: TIMP-like (From Topology)	T: TIMP-like	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth B]	F_UNCLASSIFIED	e8cemB3	A: beta sandwiches	X: jelly-roll	H: Spermadhesin, CUB domain (From Topology)	T: Spermadhesin, CUB domain	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth B]	F_UNCLASSIFIED	e8cemB6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth B]	F_UNCLASSIFIED	e8cemB4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth B]	F_UNCLASSIFIED	e8cemB1	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth B]	F_UNCLASSIFIED	e8cemB7	A: few secondary structure elements	X: Anaphylotoxins (complement system) (From Topology)	H: Anaphylotoxins (complement system) (From Topology)	T: Anaphylotoxins (complement system)	F: F_UNCLASSIFIED	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth E], C [auth F]	PF17791	Macroglobulin domain MG3 (MG3)	Macroglobulin domain MG3	This entry corresponds to the MG3 domain found in complement components C3, C4 and C5.	Domain
A [auth E], C [auth F]	PF01835	MG2 domain (MG2)	MG2 domain	This is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. How ...	This is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain is termed macroglobulin-like (MG) domain 2 and in Salmonella enterica ser A2Ms, this is domain 4 [2] [3].	Domain
A [auth E], C [auth F]	PF17789	Macroglobulin domain MG4 (MG4)	Macroglobulin domain MG4	This domain is MG4 found in complement C3 and C5 proteins.	Domain
A [auth E], C [auth F]	PF07703	Alpha-2-macroglobulin bait region domain (A2M_BRD)	Alpha-2-macroglobulin bait region domain	Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and spe ...	Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain encompasses macroglobulin-like domain MG5 and 6 including bait region. In Salmonella enterica ser A2Ms, this domain encompasses MG7 and MG8 including the bait region [1] [2]. The Bait region is cleaved by proteases, followed by a large conformational change that blocks the target protease within a cage-like complex. This model of protease entrapment is recognised as the Venus flytrap mechanism [1].	Domain
B [auth A], D [auth B]	PF01821	Anaphylotoxin-like domain (ANATO)	Anaphylotoxin-like domain	C3a, C4a and C5a anaphylatoxins are protein fragments generated enzymatically in serum during activation of complement molecules C3, C4, and C5. They induce smooth muscle contraction. These fragments are homologous to a three-fold repeat in fibulins. ...	C3a, C4a and C5a anaphylatoxins are protein fragments generated enzymatically in serum during activation of complement molecules C3, C4, and C5. They induce smooth muscle contraction. These fragments are homologous to a three-fold repeat in fibulins.	Domain
B [auth A], D [auth B]	PF00207	Alpha-2-macroglobulin family (A2M)	Alpha-2-macroglobulin family	-	Family
B [auth A], D [auth B]	PF01759	UNC-6/NTR/C345C module (NTR)	UNC-6/NTR/C345C module	Sequence similarity between netrin UNC-6 and C345C complement protein family members, and hence the existence of the UNC-6 module, was first reported in [1]. Subsequently, many additional members of the family were identified on the basis of sequence ...	Sequence similarity between netrin UNC-6 and C345C complement protein family members, and hence the existence of the UNC-6 module, was first reported in [1]. Subsequently, many additional members of the family were identified on the basis of sequence similarity between the C-terminal domains of netrins, complement proteins C3, C4, C5, secreted frizzled-related proteins, and type I pro-collagen C-proteinase enhancer proteins (PCOLCEs), which are homologous with the N-terminal domains of tissue inhibitors of metalloproteinases (TIMPs). The TIMPs are classified as a separate family in Pfam (Pfam:PF00965) [2]. This expanded domain family has been named as the NTR module [2].	Domain
B [auth A], D [auth B]	PF21406	Complement component 3, CUB domain, first segment (C3_CUB1)	Complement component 3, CUB domain, first segment	This entry represents the first segment of the CUB domain from complement component C3, which is completed but a second segment represented in Pfam:PF21308. The CUB domain is interrupted by the TE domain. The CUB domain forms a massive, tightly packe ...	This entry represents the first segment of the CUB domain from complement component C3, which is completed but a second segment represented in Pfam:PF21308. The CUB domain is interrupted by the TE domain. The CUB domain forms a massive, tightly packed super domain with the TE and MG8 domains [1-5]. These entry also includes venom factors, also known as Complement C3 homologues. These are complement-activating proteins with structural and functional similarities to complement component C3b, the activated form of C3 [6].	Domain
B [auth A], D [auth B]	PF07678	A-macroglobulin TED domain (TED_complement)	A-macroglobulin TED domain	-	Repeat
B [auth A], D [auth B]	PF07677	A-macroglobulin receptor binding domain (A2M_recep)	A-macroglobulin receptor binding domain	This family includes the receptor binding domain region of the alpha-2-macroglobulin family.	Domain
B [auth A], D [auth B]	PF21308	Complement component 3, CUB domain, second segment (C3_CUB2)	Complement component 3, CUB domain, second segment	Complement C3 is major component in the both the classical and alternative complement activation pathways. C3 is cleaved into two chains (alpha and beta) by C3 convertases. This entry represents the second segment of the CUB domain, which is complete ...	Complement C3 is major component in the both the classical and alternative complement activation pathways. C3 is cleaved into two chains (alpha and beta) by C3 convertases. This entry represents the second segment of the CUB domain, which is completed by Pfam:PF21406 [2]. The CUB domain is interrupted by the TE domain. The CUB, TE and MG8 domains form a massive, tightly packed super domain. This entry also includes venom factors, also known as Complement C3 homologues. These are complement-activating proteins with structural and functional similarities to complement component C3b, the activated form of C3 [6].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E], C [auth F]	Complement C3 beta chain	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity C5L2 anaphylatoxin chemotactic receptor binding protein binding binding signaling receptor binding G protein-coupled receptor binding C5a anaphylatoxin chemotactic receptor binding	cellular response to stimulus positive regulation of cell communication regulation of biological process regulation of signaling regulation of cellular process positive regulation of signal transduction response to stimulus signaling biological regulation positive regulation of biological process regulation of signal transduction positive regulation of G protein-coupled receptor signaling pathway cell communication positive regulation of response to stimulus regulation of response to stimulus cellular response to stimulus positive regulation of cell communication regulation of biological process regulation of signaling regulation of cellular process positive regulation of signal transduction response to stimulus signaling biological regulation positive regulation of biological process regulation of signal transduction positive regulation of G protein-coupled receptor signaling pathway cell communication positive regulation of response to stimulus regulation of response to stimulus regulation of cell communication G protein-coupled receptor signaling pathway cellular process signal transduction regulation of G protein-coupled receptor signaling pathway positive regulation of cellular process positive regulation of signaling neutral lipid metabolic process neutral lipid biosynthetic process regulation of triglyceride metabolic process regulation of lipid metabolic process lipid biosynthetic process regulation of primary metabolic process acylglycerol biosynthetic process triglyceride metabolic process triglyceride biosynthetic process regulation of biosynthetic process regulation of triglyceride biosynthetic process primary metabolic process biosynthetic process glycerolipid biosynthetic process metabolic process glycerolipid metabolic process regulation of lipid biosynthetic process acylglycerol metabolic process regulation of metabolic process lipid metabolic process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway immune response immunoglobulin mediated immune response adaptive immune response immune effector process immune system process B cell mediated immunity regulation of immune response activation of immune response regulation of localization lipid storage lipid localization positive regulation of lipid localization maintenance of location localization regulation of lipid storage regulation of lipid localization macromolecule localization positive regulation of lipid storage fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process hexose transmembrane transport regulation of transport transport carbohydrate transport establishment of localization positive regulation of D-glucose transmembrane transport transmembrane transport regulation of transmembrane transport positive regulation of transport D-glucose transmembrane transport positive regulation of transmembrane transport regulation of D-glucose transmembrane transport monosaccharide transmembrane transport carbohydrate transmembrane transport positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of phosphate metabolic process positive regulation of metabolic process positive regulation of protein modification process regulation of phosphate metabolic process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of protein phosphorylation phosphorus metabolic process protein modification process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process regulation of macromolecule metabolic process macromolecule modification regulation of phosphorus metabolic process regulation of phosphorylation macromolecule metabolic process defense response response to stress inflammatory response biological process involved in interspecies interaction between organisms complement activation, alternative pathway response to biotic stimulus innate immune response response to external biotic stimulus response to other organism defense response to symbiont response to external stimulus defense response to other organism	cellular anatomical structure extracellular region extracellular space
B [auth A], D [auth B]	Complement C3 alpha chain	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity C5L2 anaphylatoxin chemotactic receptor binding protein binding binding signaling receptor binding G protein-coupled receptor binding C5a anaphylatoxin chemotactic receptor binding	cellular response to stimulus positive regulation of cell communication regulation of biological process regulation of signaling regulation of cellular process positive regulation of signal transduction response to stimulus signaling biological regulation positive regulation of biological process regulation of signal transduction positive regulation of G protein-coupled receptor signaling pathway cell communication positive regulation of response to stimulus regulation of response to stimulus cellular response to stimulus positive regulation of cell communication regulation of biological process regulation of signaling regulation of cellular process positive regulation of signal transduction response to stimulus signaling biological regulation positive regulation of biological process regulation of signal transduction positive regulation of G protein-coupled receptor signaling pathway cell communication positive regulation of response to stimulus regulation of response to stimulus regulation of cell communication G protein-coupled receptor signaling pathway cellular process signal transduction regulation of G protein-coupled receptor signaling pathway positive regulation of cellular process positive regulation of signaling neutral lipid metabolic process neutral lipid biosynthetic process regulation of triglyceride metabolic process regulation of lipid metabolic process lipid biosynthetic process regulation of primary metabolic process acylglycerol biosynthetic process triglyceride metabolic process triglyceride biosynthetic process regulation of biosynthetic process regulation of triglyceride biosynthetic process primary metabolic process biosynthetic process glycerolipid biosynthetic process metabolic process glycerolipid metabolic process regulation of lipid biosynthetic process acylglycerol metabolic process regulation of metabolic process lipid metabolic process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway immune response immunoglobulin mediated immune response adaptive immune response immune effector process immune system process B cell mediated immunity regulation of immune response activation of immune response regulation of localization lipid storage lipid localization positive regulation of lipid localization maintenance of location localization regulation of lipid storage regulation of lipid localization macromolecule localization positive regulation of lipid storage fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process hexose transmembrane transport regulation of transport transport carbohydrate transport establishment of localization positive regulation of D-glucose transmembrane transport transmembrane transport regulation of transmembrane transport positive regulation of transport D-glucose transmembrane transport positive regulation of transmembrane transport regulation of D-glucose transmembrane transport monosaccharide transmembrane transport carbohydrate transmembrane transport positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of phosphate metabolic process positive regulation of metabolic process positive regulation of protein modification process regulation of phosphate metabolic process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of protein phosphorylation phosphorus metabolic process protein modification process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process regulation of macromolecule metabolic process macromolecule modification regulation of phosphorus metabolic process regulation of phosphorylation macromolecule metabolic process defense response response to stress inflammatory response biological process involved in interspecies interaction between organisms complement activation, alternative pathway response to biotic stimulus innate immune response response to external biotic stimulus response to other organism defense response to symbiont response to external stimulus defense response to other organism	cellular anatomical structure extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E], C [auth F]	IPR019742	Alpha-2-macroglobulin, conserved site	Conserved Site
A [auth E], C [auth F]	IPR009048	Alpha-macroglobulin, receptor-binding	Domain
A [auth E], C [auth F]	IPR041555	Macroglobulin domain MG3	Domain
A [auth E], C [auth F]	IPR049466	Complement component 3, CUB domain, first segment	Domain
A [auth E], C [auth F]	IPR001599	Alpha-2-macroglobulin	Domain
A [auth E], C [auth F]	IPR047565	Alpha-macroglobulin-like, thiol-ester bond-forming region	Conserved Site
A [auth E], C [auth F]	IPR048848	Complement component 3, CUB domain, second segment	Domain
A [auth E], C [auth F]	IPR018081	Anaphylatoxin, complement system	Homologous Superfamily
A [auth E], C [auth F]	IPR035815	Complement C3-like, NTR domain	Domain
A [auth E], C [auth F]	IPR018933	Netrin module, non-TIMP type	Domain
A [auth E], C [auth F]	IPR001840	Anaphylatoxin, complement system domain	Domain
A [auth E], C [auth F]	IPR041425	Complement C3/4/5, macroglobulin domain MG1	Domain
A [auth E], C [auth F]	IPR011625	Alpha-2-macroglobulin, bait region domain	Domain
A [auth E], C [auth F]	IPR001134	Netrin domain	Domain
A [auth E], C [auth F]	IPR008993	Tissue inhibitor of metalloproteinases-like, OB-fold	Homologous Superfamily
A [auth E], C [auth F]	IPR011626	Alpha-macroglobulin-like, TED domain	Domain
A [auth E], C [auth F]	IPR000020	Anaphylatoxin/fibulin	Domain
A [auth E], C [auth F]	IPR036595	Alpha-macroglobulin, receptor-binding domain superfamily	Homologous Superfamily
A [auth E], C [auth F]	IPR002890	Macroglobulin domain	Domain
A [auth E], C [auth F]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth E], C [auth F]	IPR050473	Alpha-2-macroglobulin/Complement system	Family
A [auth E], C [auth F]	IPR008930	Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid	Homologous Superfamily
A [auth E], C [auth F]	IPR040839	Macroglobulin domain MG4	Domain
B [auth A], D [auth B]	IPR019742	Alpha-2-macroglobulin, conserved site	Conserved Site
B [auth A], D [auth B]	IPR009048	Alpha-macroglobulin, receptor-binding	Domain
B [auth A], D [auth B]	IPR041555	Macroglobulin domain MG3	Domain
B [auth A], D [auth B]	IPR049466	Complement component 3, CUB domain, first segment	Domain
B [auth A], D [auth B]	IPR001599	Alpha-2-macroglobulin	Domain
B [auth A], D [auth B]	IPR047565	Alpha-macroglobulin-like, thiol-ester bond-forming region	Conserved Site
B [auth A], D [auth B]	IPR048848	Complement component 3, CUB domain, second segment	Domain
B [auth A], D [auth B]	IPR018081	Anaphylatoxin, complement system	Homologous Superfamily
B [auth A], D [auth B]	IPR035815	Complement C3-like, NTR domain	Domain
B [auth A], D [auth B]	IPR018933	Netrin module, non-TIMP type	Domain
B [auth A], D [auth B]	IPR001840	Anaphylatoxin, complement system domain	Domain
B [auth A], D [auth B]	IPR041425	Complement C3/4/5, macroglobulin domain MG1	Domain
B [auth A], D [auth B]	IPR011625	Alpha-2-macroglobulin, bait region domain	Domain
B [auth A], D [auth B]	IPR001134	Netrin domain	Domain
B [auth A], D [auth B]	IPR008993	Tissue inhibitor of metalloproteinases-like, OB-fold	Homologous Superfamily
B [auth A], D [auth B]	IPR011626	Alpha-macroglobulin-like, TED domain	Domain
B [auth A], D [auth B]	IPR000020	Anaphylatoxin/fibulin	Domain
B [auth A], D [auth B]	IPR036595	Alpha-macroglobulin, receptor-binding domain superfamily	Homologous Superfamily
B [auth A], D [auth B]	IPR002890	Macroglobulin domain	Domain
B [auth A], D [auth B]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth A], D [auth B]	IPR050473	Alpha-2-macroglobulin/Complement system	Family
B [auth A], D [auth B]	IPR008930	Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid	Homologous Superfamily
B [auth A], D [auth B]	IPR040839	Macroglobulin domain MG4	Domain